To determine the daily sales amount when the temperature is 68°F using the trend line from the scatterplot, look for the value on the y-axis that corresponds to the x-coordinate of 68°F.
The approximate points near the x-value of 68°F, based on the list provided, are:
- (66, 58)
- (69, 43)
- (69, 53)
From these points, we can interpolate between the values at 66°F and 69°F to estimate the sales at 68°F.
At 66°F, the sales are approximately 58 dollars, and at 69°F, the sales seem to hover around 43 dollars (or could be considered as 53 based on the two data points).
Since 68°F is directly between 66°F and 69°F, we can take the average of the sales amounts at these two temperatures for a rough estimate:
- (58 + 43)/2 = 50.5
Since this is a rough guess and may not perfectly follow the trend line, a visual approximation from the scatterplot could also provide a better estimate, likely resulting in a value around 50 to 55 dollars, as the data is somewhat scattered.
However, since we are asked to round to the nearest whole number and provide an estimate, the inferred daily sales amount at 68°F would likely fall around:
$50